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I have been using S21 Series-Thru method to measure high impedances coming up in a year now in March. Is that the method you use? 73

If you "zoom in" to a narrower frequency range by changing the stimulus range the interpolation feature will provide intermediate data points. There is some error but I find it acceptable. Roger

I cant beleive a single word "BRICKED" can create so much contreversy! Anyway, I think I am good think I may try to run the ST-Link V2 procedure (if I can find it back! :P ) to see if it makes a

I hate to admit it, but the measurements were made using the HP 8753C - just because I'm far more familiar with that piece of test equipment. I certainly could have used the NANOs. My lab is

In a recent post I documented how It is possible to measure a 1000 ohm resistor to within 1% and a 3000 ohm resistor to within 3% using a NanoVNA-H4 and a suitable test jig. The graphs are attached

Don, I intend to use it to check and adjust the resonance of various temporary antennas when I operate portable. I have found 100kHz step is sufficient since the final test is to test with the

Roger, I will look at the model with the SD card connector. I don't mind having to file the case. The plastic case is lighter than the other analyzers which is an asset when hiking. The case corners

Yes, I biffed it yesterday in initially quoting εr. I entered the published velocity factor of 0.91 instead. My error. However, the effective εr can be derived from Vp as: εr = [1/ SQRT(Vp)].

i have encountered a situation when i bricked, oh crap, oh $hit, kaput or whatever u call it when the device no longer works as expected and tried to reflash and the programmer said it verified ok but

That's why I bought a -F, after trying my early -H outdoors many times. Or make a "viewing hood" out of black cloth. -- Doug, K8RFT

The ARRL Ant Book-supplied program TLW, has most of the "450 ohm line" at about 405. Don't know how you applied the Nanovna but for impedances above a few hundred ohms S11 accuracy falls apart. I

Dave, Why should that calculator be correct? Second, why not measure the Zo with the nano? in combo with the 1/8 lambda trick or 1/4 lambda + SmithChart trick? 73 Arie PA3A Op 25-2-2021 om

Bricked to me means irrevocably broken, not wrong firmware or user bootloader installed. It is very difficult to do short of supplying overvoltage or physically damaging. Installing the wrong firmware

Manfred - Thank you! That post is very helpful, Now I have a chance at (re-) sorting my cores. I can now go from E, rod, broken, conductive (iron), and non-conductive (ferite) piles to something a

David, After reading your post I was sure I had read somewhere about windowed ladder line not being the advertised 450 ohms. I dug around a little and found this post from years

Why an εr of 0.91 ?? Air is 1.00054. When I put your wire spacing (21.6mm) and conductor diameter 1.29 mm) in I get the following for air 420 ohms. What is the εr of windowed ladderline that is

Yes, it is, Jim. We're not dealing with metamaterials!! Too many things going on in my 74 YO gray matter. With a measured Vp of 0.87, the effective εr should be 1.07. Dave - WLEV

Yes, much better calculator. Yes, I biffed it a bit on εr. Wireman gives Vp = 0.91. I measure 0.87 which yields an εr of 1.07. But given my measurements of L and C for 7.17 feet, I still see

I always get a kick out of it when someone mentions SimSmith. The Sim Smith Bridge in Indiana was built in 1883. (OK, I'm in a weird mood today.) :-) Zack W9SZ wrote:

It is quite a feat to get a relative epsilon less than 1 <grin> You can do it with ionized plasmas, but I suspect that's n